This video is close to what I do but it is missing a couple of very important steps.
https://youtu.be/usTuFLEoyJ8?si=RzeeeBLo_eYH4ACTFirst you are not cutting a wedge at the bottom just removing the bark on opposite sides about half an inch to one inch adjacent to a node. I assume your roots come out at the node.
In place of the orange powder I use a root hormone. To make the hole for you cutting, use a pencil or something else with about the same diameter. Gently push the soil against your cutting after placing it in the hole. I don't know if this step is important but I do it. At a minimum, I know it prevents the rooting hormone from being displaced which may occur if you push the cutting into the soil.
The most important missing information is how to keep the soil moist and the top humid.
In my case, I partially bury the cup in a larger pot to that the holes cut in the cup are below ground. I create a dome above the cup with am old plastic bottle. I usually will use a 2 liter soda bottle. I cut off the base and push the bottle into the dirt covering the partially buried cup so that the bottle forms a dome over the cup. I can open or close the cap of the bottle to let in air or keep the humidity vey high. To keep the soil in the cup moist I thoroughly water the pot (outside the dome) and the soil in the cup will pull what it needs from the pot. The soil in the pot should be a well draining soil and will usually be moist not wet.
I have a slight variant which works well too where I cut a bottle in half, plant in the lower half and use the upper half to make the humidity dome.
Considering some people can root guava in water, I am not sure how critical the moisture management is but it worked for me that way and I continued using that approach.
Good luck.